Ground working machine



y 1953 c. E. FEIRGUSON ET AL 2,638,043

GROUND WORKI NG MACHINE 3 Sheets-Sheet 1 Filed June 1, 1950 INVENTOR Car/E i e/'7 Kendal! Fer 7000/1 Robe/f C/a/re Fer usog Max A TTORNEY M y 1953 c.- E. FERGUSON El AL 2,633,043

. GROUND WORKING MACHINE Filed June 1, 1950 3 Sheets-Sheet 2 nvmvrozc Carl ii fer usan Kane/q Fer 060/? Robert C/alre 76 76 A TTOR/YE Y.

y 12, 1953 v c. E. FERGUSON ET AL 2,638,043

GROUND WORKING MACHINE Filed June 1, 1950 3 Sheets-Sheet 3 Ill INVENTOR. Car/ 7? Fez/70500 Kendal! Fer ado/7 Robe/1 C/d/re Fer 7400/; 2r

ATTORNE).

support. H g Fig. 4 is a fragmentary sectional viewcorre- Patented May 12, 1953 I I -2,6ss,043 g QGRoU D WORKING MACHINE "Carl E. Ferguson, KendallFerguso'n, and Robert Claire FergusongEau Claire; Mich., assignors to Y Berrien Tool and Die CompanyyEau-"Claim,

Mich acorporation of Michigan Application J fngi, 195.0, Serial No. 165,482'J This invention relates to improvementsfina round 'workingmachine;

- The main objects of this invention are? j First, to provide "a ground working machine which is welladapted f ori'u'se in vvork i'ng sod surfaces suc as thegreens of goltcourses'lawns "and the like to 'ventilateor'aerate the same.

Second, to provide a machinefof this f'charad ter in which the ground is pierced 'to provide substantially uniformly spaced holes therein; to aerate and to permit efiective application'otwaterand fertilizeri'l; Q r I Third, to provide a machineo'f the character escribed which is entirely autoi'natio in j operation and of large capacity Objects relating to, details and 'ecOnorniesof the i venuq wm; appear from the description to"f ollow.' Theinventionis pointed out'in the Tclaims. ,s i

' A preferred embodiment of the-invention ds l illustrated: in c in draw ngs, in

whichzf P N I Fig; lis a front elevational View of then 1achine embodying our'invention, one tool "being shown' in actuated "'position'by dotted lines.

Fig; 2 is'a fragrnentary plan view, cer'tainof "th concealed parts in this view being indicated b ydott'edl ines; p H 'Fig'; 2A is a view partially intertidal; section illustrating details of the mounting ofthtool Q turret.

Fig. 3 is an enlarged'fragmentary View looking from the left of Fig; 1 illustrating the relaporting heads being "sition;

lustrated in engaged D I "Fig 12 is a-frag entary view partially in secf tion of a modified form of thetool;

f 'Figf 13 is a tragm'entary view partially in vertical section showing details of one of the prongs jofthe embodiment of Fig. 12. L j ""1 The embodiment of 'our invention illustrated in 'the'accompany'ing drawing comprises 'a'yoke-like frame I, the downwardprojecting arms Z of Whic'zhfare provided with spindles 3 'for thecarv rying and ftraction wheels l. The third'steering "i vheel'dis providedbutthe'details of mounting and manipulation of thi'sfwheel are not'illustrate'das they formno 'part of this invention;

" The machine "is powered by "an engine indicatfed at B'Whi'cli is"c0nnected to the driving shaft fl by rhansof'thetransinission chain 8. The

driving shaftis mounted'on the top of theyokelikeframe; bearings Qbeing provided therefor.

J Thje'reducinggea'rings indicated at it! drive stub shafts I l which are connected to the pulleys l2 on the wheel'sp'indlese by means of belts l3.

"Ih e*multipletool turret unit comprises the vertical shaft 14 mounted'in suitable bearings on the franie' and provided with a worm gear";

on its upper end coacti'ng Withthe orm I! on thedriving shaft.

tionship of the tool actuating plungerto the tool I sponding to line 4-4 of Fig. 3.

Fig. 5 'is an enlarged fragmentary View on a line corresponding to 'the broken line 5- -5fof H M. Fig. 6 is a fragmentary viewjof one of the tool crossheads taken on a line corresponding to the 'broken line 6-4501 Fig. '7.

Fig. 7' is a fragmentary side elevational view of one of the tools.

Fig. 8 is an enlarged fragmentaryj'vi ew ona line corresponding to line 8-8 of Fig. 5 showing details 01: thetool'guides.

Fig. 9 is aside elevation formofto olprongg v V Fig. l0 is a perspectiveview of a modified form ofvthe tool actuating plunger} U Fig. 11. is a sectionalview of the jaw portion of the plunger on a line corresponding to the "broken line I l of Fig. 10', one of the tool sup which'i-eciprocate between the laterally spaced the lower bearingmemberi'support I9 (see Figs. isenda);

'Ihe crossheads' 23 are preferablyprovidedfwith seats 328 for' the channel shaped attachi ends "129' of 1 the prongs 24', the prongs being" clamped in: these seats by the clainp members 3fisecured :by the bolts 3!. Theseats 32 ofthe crossheads "are shaped to receive the prongs in reverse posi- "tion as shown. in Fig. "6, the clamp member 33 being secured"by'lag screws v3A. With the parts a anged theitool crossheads are retained: in radial relation as the turret revolves. M In'their retracted position the tools clear the surface over which the machine travels.

The plunger 35 is provided with spaced jaws 31 at its lower end adapted to receive the shanks of the tools between them with the disc-like shank heads 38 of the tools above the jaws as is shown in Fig. 11. The tools are supported in their retracted position by means of the annular support 39 whichsupportingly engages the'headsp This support .hasanropening 46 at one side through which the plunger reciprocates to strike the shank heads and drive the prongs into the soil, the jaws of the plunger withdrawing the tools from the soil and returning them to initial position so that their shank heads pass onto the supportmember 39 and slide thereon to com-pletatheir cycle of movement. The plunger. is driven :by mean of the crankshaft 5! having a crank 4.2 thereon connected by the connecting rod 43 to the pins on the plunger. The crankshaft" isconnectedby the sprocket chain 55 to the driving shaftso'ithat the plunger is actuated in timed relation to the .rotation of the turret.

The opening 40 in the tool supporting member (39 of the turret isof. such length as. to permit a full stroke of the plunger while a. tool is engaged thereby. The result. is that the multiple prong -tool are successively actuated to .drive the prongs of the tools-into the. soil and to retract them. -.The plugsof-soil. cut from the ground by K the prongs ere-successively discharged from the '-side openings in the prongs.

. Thedrivingccnnections. l G. and I? to the turret,

Mandthe gearings Hi to the traction -.\vheels 4- are arranged to rotate the turret and. the traction wheels .in timed relationship sothat the peripheral speedof the-tool shanks .22 is. approximately :equal to-the peripheral .speed of .the traction wheels.4,.andtheref-ore the speed'of advance of the carriage. .The. directioniof rotation of the .turret is clockwise.asviewedih Fig.2.so that the toolactuating plungerLZE. is.positionedlalonglthe retreatmg :sideIof .the turret with respect to the direction ofadvancelof the machine.' 7 Since the peripheral speedof the tool shanks is approxi- .mately equal-to the ground speed of the-machine,

"and opposite theretoonthe retreating'side of the 1- turret, the speedof the tool shank engaged with -theactuating'plunger willbe approximately zero with respect to the ground during the" time that the plung-erand engaged tool are reciprocated. The actuated tool will therefore-movedownwardly-intothe groundand thenupwardly with little or .no horizontal movement relative to the ground,

and :there is no force-tending to} bend the'pro'n'gs or tear the turf.

.MIn the-modification shown in 'lFigL 9. the side openings 46 extend well toward the bottom of the prongil otherwise the prong is the same as that Lillustratedin-Fig; 7. Y'Theprong l'l clears somewhat more readily than the prong 24. In' the embodiment shown in.Fig'..12 the prongs lfiare .formed as. castings. and are securediin' the-lower .endof .the shank 22. 11: thislembodii'nent'lthe tools are provided with upwardly projecting guide .rods 49- reciprocating in guide holes 50 provided Y therefor .in the lower hearing SLlDpOI't -I'B.

" Injoperation' the machineillustrat'ed. is .hand

- guided,-the handle being indicatedatili The v.inachine treats a strip of uniform width. '.In

treating greens of golf courses the preferred prac -.tice is to sweep up the plug's.but in treating l'lawns that; is not necessaryfThe machine Iof Your'invention is highly "efficient-and. of..larg capacity.' With the applicants commercial. embodiment illustrated it is practical to. treatlahout 2,000 s1.ft.p8r hour.

We have illustrat d and described our invention in a highly practical commercial embodiment thereof. We have not attempted to illustrate or describe other embodiments or adaptations as it is believed that this disclosure will enable those skilled in the art to embody or adapt our inventiornas-may be desired.

QHavingthusdescribedour invention, what We claim as new and desire to secure by Letters Pat- 'ent is:

1. In a ground working machine, the combination of a'carriage comprising a yoke-like frame provided with outwardly projecting traction wheel spindles on its arms, traction wheels on said spindles,- a transversely disposed. driving :xshafh on-saidtframe having driving connections to said traction wheels, a turret including a turret "shaft disposed-vertically between the arms of said :ir'a-m'e and having driving connection to said driving shaft, vertically spaced bearing support mem- .bers..on said turret shafteach having an annular series of angularly spaced bearings, the corre sponding bearings'of the series being vertically aligned, multiple prong tool having shanks .slid- .able in said-aligned bearingasaid driving connections to said'wheels and to said turret shaft being such that theperipheral speedof said wheels approximately equals the peripheral speed 'offisaid tools, the tool comprising crossheads on said hanks on which the prongs are mounted in spaced relation, the prongs having-tubular tip and side discharge openings above said tubular tips, the

- crossheadshaving guides slidably. engaging. guide a vertically reciprocating plunger disposed at one members on. one ofthexbearing support members to maintain the tool crossheads in radially extend- .ing relation on. the turret, said shanksYhaviiig disc-likesupporting heads at theirnpper ends,

. an annularitoolsupport disposed above saidbearing members to engage and slidably supporttho heads ofthetool. shanksdas the turret revolves,

side'o'f said turret and recessed to successively receive the toolshank heads ..as the turret re- .volves, .said supporthaving an opening therein along the retreating side of said turret relative to the advancing -motioniof. said. carriage. through which said plunger reciprocates, and means for actuating said plunger to successively actuatethe tools, the-plunger acting in its returned position to guide theactuated tool onto said tool support.

2. In a ground working machine, the combination of a carriage having a. frame, a turret including a turret. shaft disposedvertically. on .said

; frame, vertically. spaced bearing support members on said turret shaft each having an annular series of angularly. spaced bearings, the .corresponding bearings of the series being vertically .aligned,.multipleprong tools having shanks slidable in said aligned bearings, the tools comprising crossheads on said shanks on which the prongs are mountedin spaced relation, the prongs having tubular tips and side discharge openings above said tubular tips, the. crossheads having guides slidably engaging guide members on. one

of the bearing support members to maintain the 55 at one side of said turret and recessed tosuccessively receive the tool shank headsas the turret revolves, said supporthaving an opening therein along the retreating side of said turret relative to the advancingmotion of said carriage' through which said plunger reciprocates; and means for actuating said plunger *to successively actuate the tools, the plunger acting in itsreturned position to guide the actuated-tool onto said tool support.

3. In aground working machine, the combination of a carriage comprising a-yoke-slike vframe provided with outwardly projecting traction Wheel spindles on its arms, traction wheelson-said spindles, a transversely disposed driving shaft on said frame .having driving connections tov said qtraction wheels, a turret including. a turret' shaft disposed vertically betweenthe arms of :said frame and having driving connection to said driving shaft, vertically spaced bearing supportmembers on said turret shaft each having an'an'nular series of angularly spaced bearings, the corresponding bearings ,of the series being vertically aligned, multipleyprong toolshaving shanks. slidable in said alignedbearingsysaid driving-connections-to said wheels andto said turret-shaft being such that the peripheralspeeduof said wheels approximately equals the peripheral speed oj-sa id tools, the tools comprising crossheads on said shanks onv which the prongs are mounted in spacedrelation, theprongszhaving tubular tips and side. discharge openings; above said tubular tips, coacting uide members on said cross'heads and said turret, said: shanks .havingpdisc-like supporting heads at their upper ends, an -annular tool support disposed; above said, bearing support members to engage andislidably support. the heads of the tool shanks asthe" turret revolves, a vertically reciprocating plunger disposed .at one side of said turret andirecessed to successively .receive the; tool *shankyheads. as the-turret revolves, ,said support' having an opening therein along the'retreating sideof said turret relative to the advancing motion of said carriage through which, said plunger reciprocatesziand means for I actuating said plungerto successively actuate the tools, the plunger acting in its returned "position to guide the actuated-tool onto said tool support.

4. Inaground working machine, the combination 'of--a.carriagehaving a frame, a turretineluding, a: turret shaft disposed vertically on said frame, vertically spaced'bearing support members on said turret shaft each having ianuannular series of angularly" spaced bearings, the corresponding bearings of the series being-vertica ly aligned, multiple prong tools having shanks slidable in said aligned bearings, the tools comprising crossheads on said shanks on which the prongs are. mounted .;in spaced relation; the

prongs, having tubular tip zand discharge openings above said tubular tips, coactingguidememhers on said crossheads and-said turret, said shanks having disc-like supporting heads-at their upper ends, an annular1 tool support disposed above said bearingsupport members to'engage and slidably support the heads of the tool shanks as the turret. revolves, means :for driving sa d carriage and, for:rotating said turret and said tools at approximatelythe same peripheral speed as the speed of. said carriaga a vertically reciprooating plunger, disposed at one side-f said turret, and recesseduto successively-receive the tool shankheads 1 as :the turret revolves said support having an open ng therein alongthe retreating sideiof said turret relative to the advanc- 6 ing moti'on of said carriagethrough which said plunger reciprocates,: and meanscior actuating said plunger? to successively actuate the tools, the plunger acting in "its returned I position to guide-the actuatedtoolontosaid-tool support; 5. In a ground working machine, the combination of a carriage comprising,a yoke-likeframe provided with outwardly projecting i traction, wheel spindles on its arms, traction ,wheelson said ,Lt spindles, a transversely disposed adriving ashaft on said frame having driving-connections to said traction wheels, a turret mounted for rotation on avertical axis between thearms of said frameand having drivingconnection to saiddriviing shaft and an annular series of angularly spaced vertically l extending bearings, multiple prong tools having shanks slidably supported in said bearings, the tools andlturret having co- :acting guide means for maintainingwthe toolsin radially extending relation on theaturret;' said shanks havingadisc-like supporting heads at their upper ends, an annular support with which: said tool headsare-slidably engaged 'inretracted :po- .sition as the turret revolves,- a verticallyreciproeating plunger disposed atoneside ofzsaid turret to successively engagethe tool shank heads as the turret revolves; said driving connectionszbeing such that said wheels rotate atapproximate- 1yv the-same peripheral speed as said-turret and said tools, said support having an. opening therein along the retreating side of said turret-relative =to,.theadvancing motion of said carriage through which said plunger reoiprocates, and means for actuating said plunger to successively. actuate the tools, the plunger acting in its returnedposi- ,tion': to guidezthe. actuated tool-onto saidsupport.

6.In a ground workingxmachine; the combination of a carriage comprisinga-y0kelike: frame provided with outwardlywprojecting traction wheel spindles on its arms; traction wheels'on said'- spindles, -a transversely disposed driving shaft on i said frame having driving-connections to said traction wheels, a turret '-mounted =-for rotation on a vertical axis between the arms of said frame-' and having driving connection to said driving shaft andan annularseries'ofangularly spaced Vertically extending bearings, multiple prong tools having shanks slid'ablysupported'in said bearings, said shanks having disclike supporting heads attheir upper ends, anar'inular support with which said tools are 'slidably engaged inretracted position as 'the' turret revolves; said driving connections" being such that said wheels rotate at approximately thesame peripheral speed as saidturret-and said t'oolsI-"a vertically reciprocating plunger disposed "along the retreating side of said'turret relative to the path of movement of said'carriag'eto successively en age the tool 'shank-heads 'as*the turret're- -volves,-a nd means for actuating said plunger-to successively actuate the tools, the plunger acting in its returned position to guide the actuated tool onto said tool support. a '7, In a ground working machinethe'combinaltion of a carriage, a turret including a 'turret shaft, vertically spaced bearing'support members on said turret shaft each having an annular-series of angularly spaced verticallyextending'bearings, the corresponding bearings of-the series being vertically aligned, multiple prong toolshaving shanks slidable-in said aligned bearings, the tools comprising crossheads on said shanks on which the prongs are mounted in spaced "relationgithe crossheads and "one of the bearing support members having coacting guides acting'tomaintain reassess ithe vtooli crcssheadsrzi "sradiailyiextendingfiremltiomzonrthe turret; :saidlshanks having support- .ling heads at rtheir iupp'er r ends, 'an 12111111131 tool tsupport-i dispo'sedt above csaidicbearing "support members". toi'zzengage' land :slidably :support the heads :of theltooliz'shanks'as the turret revolves, "lneanscfor zdriving said carriage and for rotating .-sa'id-tu1ret'iand :said tools at approxiin'ately the :same erip'heral'speedias the speedofisaid -oarmm: a vertioallyreciprocating plunger disposed :along-theiretreatinglside of said'turret relative to -thezpathoirmovement ofsaidcarriage to successively' receive rthe'itoolshank heads as the turret revolves; and nieanszfor'actuating said'plunger 'to successively actuate thetoolsgthe plunger acting I i inits: returned position to guide the actuated tool sontossaid' tool support.

18. in aa'ground'working machine, the combinaition'of a ."carriage; a turret including a "turret ishaftgivertically spaced-'bearing'isupport members uorrsaid turret shaft.each havingan'a'nnular series for 'angularlyispacedvertically extendin'g'bearings, the correspondingbearings :of the'series "being vertically aligned, multiple prong .toolshaving cshanks slidable "in "said aligned bearings-"said shanks-having supporting heads at theiryupper en'dsgran annular tool sup-port disposed above said bearing :support members toengage 'and slidably isupportthe heads of' the tool shanks as the turret revolves,means .for driving said carriage-and for rotating-said turret-- and said tools at approxirmatelythersame peripheral sp'eed'as the speed of saidzoarriage; a-vertically reciprocating plunger rdisposed' alongithezretreating side of said" turret relative to the :path ofniovement of said carriage to successively 'receive the tool shank heads as theturret-revolves; and means for actuating said plunger cto' suocessively actuate the tools, *the :plunger acting in its return'ed position to guide the-ractuatedp tool onto said tool 'support.

;--9. In a ground working machine, the-combination .ofawarriage, a'turretincluding a turret 'shaft, wer-tically' spaced bearing support members ion-said turretshaft each having an annulartseries .oi :angularly spaced vertically ex-tending bearings, thecorrespondinghearingsof the series being'verticailyaligned, multiple prong tools having shanks slidable in said aligned hearings 'and thetools comprising crossheads on said shanksron which the pron-gs are mounted in 'spaced-rela- 1,

' 'tion, the I crossheads and one of the-bearinglsupporttmembers having-coacting guides acting to maintain the tool-.crossheads in radially extend- .ing relation on .the'turret, anannulartool sup- :portdisposed to-engage andslidably support the shanks of the tools asthe turret revolves, means "for driving said carriage and forrotating said .turretand said tools at approximately the same peripheralspeed'as the 'speedfof said carriage, a

-- zertically reciprocating plunger disposed along devotees;means fforrdrivingcdaidccarriage; and "for rotating. :said =.turret -:and. said tools at approxi- .:mately the'same-peripheral' speed-las the speedier said carriage, a iver-tically'ireciprocatingiphmger ,disposed along :the'xretreating side !Of said turret irelativedm the path of advance -of said carriage to successively engage tool shanks as the :turret 31'8- wolves; 'andHmea-ns ion-actuating said plunger-to 1 successively 1 actuate *the tools.

11. In a ground working machine, the'combination with a. carriage, of; aturreti'mountedthereon forrotation on awertical aXis;'-means for driving-said turret'as the carriageis advanced,:anianjnulareseries of :multiplemrong tools mountedion said turret,rorfindependentivertical.reciprocation, 'the prongs of the tools :beingialigned and having tubular :tips' and :side";d-isoharge Eope'nings labove ;said tubular tips, means for maintainingthetoOls with their rprongsrimradially aligned relation-es the turret-revolves and as 'the'tools are I-recipro- "cated, said turret driving means being operative to rotate said tools'at-a peripheral spe'edapproxi- :matelya equal :to thespeed of advanceof said carriagetmeans' for successively actuating said tools comprising: a w'unif'orm stroke power actuated iplunger' disposed along *the' retreating *side of said turretz-relative tolthe direction of advanceof said carriagezwhei-eby the prongs are forced into the :ground'to a predeterrnined depth, and'a supportfor maintaining the tools in-retract'ed position, the stools :being automatically picked -up and transferred from *the plunger to the i support by rotatiomofthe turret whenthe "plunger is at the end ;ofi its 'retractingi stroke and a succeeding tool presented thereto.

; :12; 'In aground working machine the combination with a' carriage, of a turret mounted thereon forrotationon avertical axis; means'ror driving :said' turret ras the I carriage -is advanced, ansannular series (if-multiple prong'toolsmounted on said turret ioruindepende'nt vertical reciprocation, the iprongs offthe tools having tubular tips rand zdischarge openings above said tubular tips, :said' turret drivingmeans being :operative' to roi tate said tools at a peripheral'speed approximateslyiequal :to the" speed of'a'dvance of said carriage, meansifonsuccessively actuating said tools comprising ac'uniformzstroke'power actuated plunger disposed: along the metreating side 'of said :turret relative :to the direction :of 'advance off'sa'id "carriage whereby the prongs are forced into the groundito a predetermined depth, and a support tors-maintaining the "toolsin retracted position, the: tools being automaticallvpicked "up' and transferred from the plunger "to the support by hrotationsof the'turret when'the plunger is at'the .end of its retracting stroke and a succeedingtool presented thereto.

'13.-In a ground'working'machine'thetcombinationwith a; carriageof a turret mountedtthereon for-rotationcon avertical axis, means for driving saidturret as the carriage is "advanced, an annular series-"of multiple prong'tools mounted on said turretfor independent 'vertical'reciprocation,'the' prongs of the tools being aligned and having tubular tips'and discharge openings above said tubular tips, means formaintaining the tools with their prongs in radially aligned relation "as the-turret revolves sand asthe'tools are reciprocated, saidturret "driving means being operative ttc rotatesaiditools at a'peripheralspeed approxirn'ately" equalwto' the: speed of advance of said carriage, means for successively: reciprocating said tools fat azpositi'ontalong'theretreatingsideofzsaid turret :relativeztoithe direction of advance 'of sa'id carriage, and a support for maintaining the tools in retracted position when rotated out of registry with said reciprocating means, the tools beimg automatically picked up and transferred from the reciprocating means to the support by rotation of the turret when the reciprocating means is at the end of its retracting stroke and a succeeding tool is presented thereto.

14. In a ground working machine, the combination with a carriage, of a turret mounted thereon for rotation on a vertical axis, means for driving said turret as the carriage is advanced, an annular serie of multiple prong tools mounted on said turret for independent vertical reciprocation, the prongs of the tools having tubular tips and discharge openings above said tubular tips, said turret driving means being operative to rotate said tools at a peripheral speed approximately equal to the speed of advance of said carriage,

means for successively reciprocating said tools at 15. In a ground Working machine, the combination with a carriage, of a turret mounted thereon for rotation on a vertical axis, means for driving said turret as the carriage is advanced, an annular series of multiple prong tools mounted on said turret for independent vertical reciprocation, means for maintaining the tools with their prongs in radially aligned relation as the turret revolves and as the tools are reciprocated, said turret driving means being operative to rotate said tools at a peripheral speed approximately i equal to the speed of advance of said carriage, and means for successively reciprocating said tools at a position along the retreating side of said turret relative to the direction of advance of said carriage comprising a uniform stroke power actuated plunger whereby the prongs are forced into the ground to a predetermined depth.

16. In a ground working machine, the combination with a carriage, of a turret mounted thereon for rotation on a vertical axis, means for driving said turret as the carriage is advanced, an annular series of multiple prong tools mounted on said turret for independent vertical reciprocation, said turret driving means being operative to rotate said tools at a peripheral speed ap proximately squal to the speed of advance of said carriage, and means located along the retreating side of said turret relative to the line of advance of said carriage for successively actuating said tools comprising a uniform stroke power actuated plunger whereby the prongs are forced into the ground to a predetermined depth.

17. In a ground working machine, the combination with a carriage, of a turret mounted thereon for rotation on a vertical axis, means for driving said turret as the carriage is advanced, an annular series of multiple prong tools mounted on said turret for independent vertical reciprocation, said turret driving means being operative to rotate said tools at a peripheral speed approximately equal tothe speed of advance of said carriage, the prongs of the tools having tubular tips and discharge openings above said tubular tips, and means located along the retreating side of said turret relative to the line of advance of said carriage for successively actuating said tools.

CARL E. FERGUSON. KENDALL FERGUSON ROBERT CLAIRE FERGUSON,

No references cited, 

